我目前正在使用AForge DLL來呈現實況視圖的圖片框上的視頻。我確實有一個視頻幀功能,以確定是否將WriteFrame或當前的圖片框框架截圖爲JPG。System.Drawing參數無效
但我遇到了一個問題,有時程序會提示出錯的參數無效或對象已被用在其他地方。我確實試圖找到解決方案來解決它,我很確定我確實在圖像和克隆圖像上進行了處理,但問題仍然存在。
你能幫我解釋我的程序有什麼問題嗎?
void videoSource_NewFrame(object sender, NewFrameEventArgs eventArgs)
{
//your code using bmp object
if (D1Pic.BackColor == Color.Green)
{
video = (Bitmap)eventArgs.Frame.Clone();
if (livePreview.Image != null)
{
//Dispose the resources
this.Invoke(new MethodInvoker(delegate() { livePreview.Image.Dispose(); }));
}
livePreview.Image = (Bitmap)eventArgs.Frame.Clone();
imgclone = (Image)livePreview.Image.Clone();
FileWriter.WriteVideoFrame(video);
}
else
{
video = (Bitmap)eventArgs.Frame.Clone();
if (livePreview.Image != null)
{
//Dispose the resources
this.Invoke(new MethodInvoker(delegate() { livePreview.Image.Dispose(); }));
this.Invoke(new MethodInvoker(delegate() { video.Dispose(); }));
}
livePreview.Image = (Bitmap)eventArgs.Frame.Clone();
imgclone = (Image)livePreview.Image.Clone();
}
video.Dispose();
livePreview.Refresh();
這裏是堆棧跟蹤錯誤:
{"Parameter is not valid."}
at System.Drawing.Image.get_Width()
at System.Windows.Forms.PictureBox.ImageRectangleFromSizeMode(PictureBoxSizeMode mode)
at System.Windows.Forms.PictureBox.OnPaint(PaintEventArgs pe)
at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer)
at System.Windows.Forms.Control.WmPaint(Message& m)
at System.Windows.Forms.Control.WndProc(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
更新的代碼:
var newFrame = (Bitmap)eventArgs.Frame.Clone();
this.Invoke(new MethodInvoker(delegate()
{
if (livePreview.Image != null)
{
livePreview.Image.Dispose();
}
livePreview.Image = newFrame;
}));
imgclone = (Bitmap)eventArgs.Frame.Clone();
//Write frame into video
if (D1Pic.BackColor == Color.Green)
{
video = (Bitmap)eventArgs.Frame.Clone();
FileWriter.WriteVideoFrame(video);
}
錯誤發生在哪條線上? –
@JeremyThompson livePreview.Refresh() – Marcus
改爲嘗試'livePreview.Invalidate()'。 –